C语言程序设计教程（第三版）课后习题11.1 （C语言代码）

解题思路:





注意事项:





参考代码:

#include<stdio.h>
int month_day[2][13]={{0,31,29,31,30,31,30,31,31,30,31,30,31},{0,31,28,31,30,31,30,31,31,30,31,30,31}};
struct day
{
    int year;
    int month;
    int day;
    int flag;
};
int to_day(struct day days);
int main(void)
{
    int year;
    int month;
    int day;
    struct day days;
    scanf("%d%d%d",&days.year,&days.month,&days.day);
    if((days.year%400==0)||(days.year%4==0 && days.year%100!=0))
    days.flag=0;
    else days.flag=1;
    printf("%d",to_day(days));
    return 0;
}
int to_day(struct  day days)
{
    int sum=0;
    for(int j=1;j<=days.month-1;j++)
    sum+=month_day[days.flag][j];
    return sum+days.day;
}